Saw-mill dog



(No Model.)

A. MYERS.

SAW MILL DQG. No. 284,973.

Patented Sept. 11, 1883.

INVENTOR ATTORN EYS I" I j WITNESSES n. PETERS Pvwmmm vm. wum m. u. c.

UNITED STATES ALVIE MYERS, OF'MELMORE, OHIO.

SAW-MIHLL Doe.

SPECIFICATION forming part of Letters Patent No. 284,973, datedSeptember 11, 1883.

' Application filed May 19, 1888. (No model.)

To all whom, it may concern:

Be it known that I, ALVIE MYERS, a citizen of the United States,residing at Melmore, in the county of Seneca and State of Ohio, haveinvented certain new and useful Improvements in Saw-Mill Dogs; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

Figure 1 of the drawings is a front view. Fig. 2 is a cross-section, andFigs. 3 and 4 are detail views.

This invention has relation to dogs for sawmill'carriages; and itconsists in the construction and novel arrangement of parts, all ashereinafter set forth.

In the accompanying drawings, the letter A designates the upright orstandard, which is bolted to the head-block of the carriage, two boltsbeing usually sufficient for this purpose. The standard A is formed withthe longitudinal channel B, the front wall of which is made in rackform, as indicated at O. Apertures D are usually made through the sidewall, E, at the upper and lower ends thereof, to facilitate theapplication of the pinion and its shaft to the slide.

F represents the slide, which is formed with hook-form lugs g, to engagethe external or edge flanges, h, of the standard A. The slide isprovided with a seat or bearing for the shank 7c of the dog L, whereofthe hook-head m is turned downward. The slide is provided with a tooth,t, which projects into the seat or bearing 1), and is designed to engagethe upper rack-edge, o", of the dog.

V represents a segment-pinion having teeth a, adapted, when the pinionis turned in proper position, to engage the teeth of the rack O. Theshaft 8 of this pinion is formed with a cam-rise, c, on the portion nextsaid pinion,

which is adjacent to the shank of the dog. The journal portion of theshaft is seated in a bearing, d, formed in the slide F, and to the endof the shaft is attached its lever-arm Z. A rest peg or stud, 6,projects from the slide.

In operating this device it should be observed that when the lever Z isthrown back against the peg e the cam c of the shafts will be turnedaway from the shank of the dog L, so that the latter will fallsufficiently to be relieved from engagement with the tooth t of theslide. The

dog can now be adjusted freely in the slide, so.

that its hookhe'ad will project more or less, as may be desired. Whenthe dog is adjusted, the lever-arm is raised,'causing the cam on thepinion-shaft to force the rack-edge of the dog into engagement with thetooth t of the slide. In this position of the shaft the segment-pinionis not in engagement with the rack O, and the slide and dog can bemoved. downward with facility to engage a log of any size, or to anydesired position 011 'the standard. Then the lever is turned down,causing the teeth of the pinion to engage the rack G and force thehookhead into the log.

Usually the pinion is provided with an end tooth, 2, which is made thickenough to serve as a stop to prevent the pinion from making arevolution. By this means the slide and dog may be readily held in anydesired position on the standard.

Having described this invention, what I claim, and desire to secure byLetters Patent,

The slide F, having the hook-lugs gtO engage a rack-standard, A, thetooth t to engage the rack-edge of the dog L, the bearing d for thecam-shaft of the pinion, and the rest-peg e, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

, ALVIE MYERS.

\Vitnesses:

J F. NEDRY, H. ARNOLD.

